Other info. - This species
can be found throughout most of Missouri but is apparently absent from
the northwest and southeast corners of the state. The big bright yellow
flowers are hard to miss in the field.
The plant is semiparasitic on the roots of oak trees but apparently does well if grown in a garden setting.

Photographs taken at Lichen Glade, St. Clair County, MO., 7-27-00 (DETenaglia); also at Little Lost Creek Conservation Area, Warren County, MO, 8-21-2016 and 9-6-2016 (SRTurner).